NetBSD Problem Report #45084
From mouse@Sparkle.Rodents-Montreal.ORG Mon Jun 20 05:25:54 2011
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Date: Mon, 20 Jun 2011 01:25:51 -0400 (EDT)
From: der Mouse <mouse@Rodents-Montreal.ORG>
Reply-To: mouse@Rodents-Montreal.ORG
To: gnats-bugs@gnats.NetBSD.org
Subject: csh "shift path" doesn't update $PATH
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>Number: 45084
>Category: bin
>Synopsis: csh's "shift", applied to "path", doesn't update $PATH
>Confidential: no
>Severity: serious
>Priority: low
>Responsible: bin-bug-people
>State: open
>Class: sw-bug
>Submitter-Id: net
>Arrival-Date: Mon Jun 20 05:30:00 +0000 2011
>Originator: Mouse
>Release: NetBSD 4.0.1 or 5.1, possibly others
>Organization:
Dis-
>Environment:
First noticed on a so-far-anonymous system during setup;
verified present on (among others)
System: NetBSD VAIO-Home.Rodents-Montreal.ORG 4.0.1 NetBSD 4.0.1 (VAIO-MP) #2: Wed Jun 8 21:19:35 EDT 2011 mouse@VAIO-A-W.Rodents-Montreal.ORG:/home/mouse/kbuild/VAIO-MP i386
Architecture: i386
Machine: i386
>Description:
csh normally mirrors changes to the path shell variable in the
PATH environment variable. However, changing $path by using
the "shift" command fails to update $PATH.
>How-To-Repeat:
% set path = ( /infibulated/gonkulator /bin /usr/bin )
% /usr/bin/printenv PATH
/infibulated/gonkulator:/bin:/usr/bin
% shift path
% set | /usr/bin/grep path
path (/bin /usr/bin)
% /usr/bin/printenv PATH
/infibulated/gonkulator:/bin:/usr/bin
%
>Fix:
As a workaround, if none of the elements of $path contain shell
syntax characters, "set path = ( $path )" works to reset $PATH.
Presumably a proper fix would be to add special-case code for
STRpath to shift(), akin to what doset() and dolet() have - or,
more work but better design, rework the relevant code so the
special case is unnecessary and the re-exporting happens
somewhere else whenever $path changes by any means.
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